Gun-sight.



No. 783,092. PATENTED FEB. 21, 1905.

i J. Y. BASS ELL & F. G. BLENKNER.

GUN SIGHT.

APPLICATION FILED MAR.10,1904.

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BLENKNER, or COLUMBUS, OHIO.

GUN-SIGHT.

SPECIFICATION formingpart of Letters Patent No. 783,092, dated February21, 1905. Application filed March 10, 1904. Serial No. 197,418.

T a/ZZ 1071 01 1 it may concern.-

.States. residing at Columbus, in the county of Franklin and State ofOhio, have invented a certain new and useful Improvement in Gun- Sights,of which the following is a specifica- .tion.

' Our invention relates to an improvement in gun-sights, and moreparticularly to that class known as open sights.

The object of the invention resides in providing an adjustablesight-plate and means whereby sight-plates of various designs may beemployed; also, means for adjusting the plate to the finest degree andmeans for looking the same in its adjusted position, together with meanswhereby the sight may be folded down flush with the gun-barrel and outof the line of vision of the peep-sight.

Finally, the object is to provide a sight that will be strong, durable,and eiiicient and one in which the parts will not be liable to get outof working order.

With the above and other objects in view the invention consists of thenovel details of construction and operation, a preferable embodiment ofwhich is described in the specification and illustrated by greatlyenlarged views in the drawings, wherein- Figure l is an enlarged rearelevation. Fig. 2 is an enlarged side elevation. Fig. 3 is a frontelevation. Fig. 4 is a longitudinal sectional view. Fig. 5 is a planView. Fig. 6 is an enlarged detail transverse sectional view on line :000 of Fig. 1. Fig. 7 is a side elevation of the sight in its foldedposition, showing the same applied to agun-barrel. Fig. 8 is a frontelevation of one of the various forms of sight-plate which may be used,and Fig. 9 is a similar view of another form of sightplate.

In the drawings the numeral 1 designates the base-block, which is formedwith beveled sides 2, adapted to fit the ordinary dovetailed groove 3,formed in gun-barrel 3, as shown in Fig. 7, whereby the sight may bereadily applied to and removed from the gun-barrel. The block 1 isprovided with a pair of upwardly-projecting semicircular bearing-lugs 4:on each side of which are formed semicircular recesses 5, in which restthe hinge-lugs 6 of the sight-frame .7, connected by a transversepivotpin 8 to form a hinge-joint,whereby the frame 7 may be folded downflush with the base-block 1. The frame 7 is formed with a pair ofoppositely-disposed guide-standards 9, having angular guideways 10 intheir adjacent edges and connected across their lower .half by a web 11,thus providing a vertical recess in the face of the frame, inwhichslides the sight-plate 12. At the rear side of the frame 7 is placed anintegral bearingsleeve 13, having acentral opening and supporting atransverse operating-shaft 14, having keyed therein a pinion 15,standing in the aforesaid opening and projecting through a slot 16 inthe web 11. The sight-plate 12 is formed on its rear face with anintegral rack 17, which lies in a groove 17, formed in the web 11 andadapted to be engaged by the pinion 15, which when rotated by the shaft14 through the wheel 18, carried on the end thereof, raises or lowersthe said sight-plate 12. The sight-plate 12 is formed with beveled edges19, which lie in the guideways 10, thus ho'ldingit against lateraldisplacement and yet allowing afree vertical sliding movement. A bindingor setting button 20 is pivoted at one of the standards 9 adjacent tothe edge of the guideway 10 and formed with a flat edge 21 and a reducedcam-surface 22 on its underside. This button may be turned to bear uponthe slide-plate 12, as shown in Fig. l, to lock the said plate frommovement after the same has been adjusted.

The sight-plate 12 is interchangeable, being readily removable from'theguideways 10 by simply sliding it vertically. We wish it understood thatwe may use various forms of sight-plates, all of which, however, are provided with central notches or sighting-points formed in the upper centeredge of the web 11 when the plate is in its lowermost position. We haveillustrated in Figs. 8 and 9 a couple only a part of the many differentdesigns which may be employed.

The standard 9 opposite that carrying the button 20 is formed along itsedge contiguous 23, adapted to register with the notch 24:,

. of modified sightplates,which, however, form to the guideway with asuitably-graduated scale 25, which is adapted to act in conjunction withthe index-point 26, provided on each plate 12. I

In order that the sight may be folded down flush with the base-block 1and parallel with the gun-barrel 3, the base-block is'formed with atransverse groove 27, having the enlarged recess 28 to receive thesleeve 13 and the pinion 15 when the sight is folded down, as shown inFig. 7 To facilitate the folding and unfolding of the sight, we form theupper ends of the standards 9 with milled edges 29, affording means bywhich the standards may be more securely grasped between the thumb andforefinger of the operator.

The desired sight-plate having been selected is inserted in the guideway10 and pushed down until the rack 17 meshes with the pinion 15, when bymanipulating the wheel 18 the plate 12 may be adjusted vertically tosuit the fancy of the operator, in which he is assisted by the index 26and scale 25. The plate 12 having been set at the desired point, thebutton is turned to cause its enlarged end to stand over and bind thesaid plate, as clearly shown in Fig. 1, thus locking the sight-plate inits adjusted position.

We do notwish to limit ourselves to the exact details of constructionand operation herein set forth, as we may make various changes in thesame without departing from the spirit of our invention and whollywithin the scope of our claims.

Having now fully described our invention, what we claim, and desire tosecure by Letters Patent, is

1. In a gun-sight, interchangeable sightplates each formed with a rack,a pinion adapted to engage the rack for adjusting the plate, and meansfor securing the plate in its adjusted position.

2. In a gun-sight, a folding frame, a plate adjustable in the frame, arack formed on the plate, a pinion supported on the frame and engagingthe rack to adjust the same, and a button adapted to engage the plate tolock the same.

3. In a gun-sight, a folding frame provided with guideways,aremovablesight-plate adapted to slide in the guideways, a rack formed on thesight-plate,ashaft supported by the frame, a pinion fixed on the shaftand meshing with the rack, means for rotating the shaft to adjust thesight'plate, and a cam-faced button adapted to engage the sight-plate tolock the same in its adjusted position.

- JOHN Y. BASSELL.

FRED GBLENKNER. In presence of M. B. SOHLEY, W. L. MORROW.

